Weatherproof paper.



To all whom/it mayconcern:

ir lvers a rained May 30, 1905.

: CHARLES-"S. BIRD, on "BA sT' WALQPOLE, AND, GEORGE, D. MQORE, on"

WORCESTER, MASSACHUSETTS, ASSIGNORS TO F. W. BIRD & son,-

I OF EASTWALPOLE, MASSACHUSETTS, FIRM.

f WEATH'E FIPROOFPAP ERr srncxmcfazrfoiv forming part of Letters Patent "No. 791,312, dated May 30, 1965.. Applicationfiled Novembor1711904. SorialNo. 233.166.

Befitknown" that we','CHARr. s S. BIRD, of

East Walpole,v in the county of Norfolk, and GEORGE D. MOORE, of'Worcester, county of f Worcester, State of. Massachusetts, have in-f vented certain new and usefulImprovements in-Vi eatherproof Paper; and we hereby de-I clare' that thefollowi'ng is a full, clear, and l exactdescription ofthe same, reference being had to the accompanyin'gdrawings, forming part of this specification- 1 This invention has reference toimprovements in paper adapted to resist the action of the weather and designed for use as roof or, wall coverings and for similar-purposes.

' One object of the invention is to construct as an article of manufacture .paper having a I protecting layerofsand or similar material,

' off from friction or from the action ,of the weather, and particularly designed to resist that the particles of sand are bound togetherv and to the paper. against accidental wearing the action of rain heating thereagainst.

Another-object of the invention is to" provide paper of this nature with asurface, adapt-v ed to "receive and retain a coating of paint.

The invention consists in the peculiar fea-" tures of the coated paper whereby the objects of the invention are carried into effect, as shall hereinafter be more fullydescribed, and pointed out in the claim.

- Figure 1 represents a diagrammatic View illustrative of the step in the process where-- by the mineral elements are pressed into in-, timate contact with the adhesive coating of the paper. Fig.2 represents a similar View illustratingthe preferred method ofv applying I II the material for filling the spaces betweenthe 1 mineral elements; Figs. 3,4, and 5 respec-' tively'represent views of the paper in three steps in the process of its manufacture.

Similar numbers of reference-designate corresponding parts throughout.

Itwill be understood that the nature of'the materials. herein described precludes exact illustration thereof in regardto'dimensions or a as to the exact shape of; the mineral elements.

Fabric-of; this nature is designed for use as protective sheathing to be applied to the ex 7 terior ofproofs-and walls'to protect the same from the action of the weather and'toprev'ent fore of great importance that the fabric should be furnished with an outer surface capable of shedding water, and thereby protect ing the body of the fabric from the action of moisture, which might otherwise be absorbed thereby after a time. It is also-desirable in some uses of the fabric that the exterior of the structure be painted and that the outer surface of the fabric should be adapted to receive and retain a coating of paint.

Experience teaches-thatthe application of an outer surface of mineral elements of small size, as grains of sand, to a fabric of this nature tends to protect thebody of the fabric I from the action of the weathelgand particularly tends to resist the action of a beating rain; butowingcto the nature of the mineral elements and of theirirregularity in shape it is difficult to secure the same to the fabric to prevent their accidental detachment by frictlon or by the washing action of rain, while the in- .terstices between" the mineral elements permit water to pass to the surface of the fabric.

In carrying this invention into practice we take a sheet or strip of fabric 6 of a fibrous nature, preferably .waterproofed paperhavj ing a coating 7 of an adhesive nature, sucha j pitch, or of a bituminous compound,-and oii' f this adhesive coating we spread in any wellknown manner a thin layer 8 of mineral ele-- I ments, preferably grains of sand, a large-proportion of which coming, into contact'with the adhesive coatingadh'eres thereto. W e

now pass this fabric, with its layer of comparativelyloose mineral elements, as shown in Fig. 3,between a pair of rolls AB,as shown in Fig. 1 of the drawings, whereby the mineral elements are'pressed into more intimate contact with the adhesive material, some of I said I elements being tbuspartially ,press'ed into said coating, las shownjn Fig." 5 of the drawings. I After the layer of mineral elements has thus been secured to he fabric'6 by means of the coating 7 we apply to the surface a layer 9 of heavy paint, which enters between the mineral elements 8 8, filling the securely fixes them to the fabric.

interstices therebetween and forming a bond which unites the mineral elements and more We prefer to apply the coating of paint as shown in Fig.

2 of the drawings, wherein the rolls C andD fabric in a layer the thickness of which is determined by the distance between the surface of the fabric, or rather of the surface of the coating 7 and the periphery of the roll C, the

object being to form this layer of paint of sufficient thickness to form a bond which unites the mineral elements. Where asmooth surface is desired, this layer of paint may enparticular thickness of this layer. a .25

'tirely cover the mineral elements; but it is not our intention to limit ourselves to any The surface formed by the paint layer is preferably adapted to receive and retain a coating of vpaint of a similar color, or of a contrasting color, where a more finished surface is desired.

It is of course obvious that other binding material may be substituted for the layer of --'paint, and for some purposes a bituminous compound may be used in place of the paint with good results.

' The accompanying drawings are designed more particularly to indicate the presence and i a relative location of the fabric,-the mineral elements, and the binding layer of paint'and are not intended to positively indicate the comparative size of these respective parts.

Therefore the present invention is not limited to any particular thickness or construction of the fabric 6 or to any particular thickness of the coating 7 and of the paint layer or bond 9, while it is obvious that the mineral elements 8 8 may be of any suitable size.

The rolls C and D may be considered as a gaging mechanism whereby the thickness of the bond layer 9 may be controlled, the roll D being the support for the fabric, while the spacing between said fabric and the roll C determines the thickness of the layer of paint supplied to the upper surface of the fabric as it passes under said roll C, it being understood that the paint or other material forming the bond layer may be sufficiently fluid that in settling between the mineral elements the tops of said elements may be exposed to view, or this result may be occasioned by the shrinking of the coating 9 during drying.

Having thus described our invention, we claim as new and desire to secure Patent As a new article of manufacture, weatherproof fabric having a coating of adhesive ma-, terial carrying mineral elements which project therefrom, and a bond layer of suitablematerial filling the spaces between said projecting portions of the mineral elements, as and for the purpose described.

In testi nony whereof we aflix our signatures in the presence of two witnesses.

. CHARLES S. BIRD.

GEORGE D. MOORE. Witnessesto Charles S. Birds signature:

DEXTER RANDALL, ELMER H. BARTLETT. Witnesses to George D.'Moores signature- LoUIs W. SOUTHGATE, ANGIE M. GODDARD.

by Letters 

